"What's Your Favorite Act of Kindness?"

1. Ashley Olsen

"It's about the small things you do every day, like tipping well and being aware of other people's feelings."

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2. Kerry Washington

"The ones that are unexpected. The other day I was getting out of a cab and a woman with a baby stroller was getting in and I just asked if she needed help. It didn't come from an 'I signed up to volunteer on this day' mentality, it was just spontaneous. When people unexpectedly help each other it gives you faith in humankind."

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3. Anna Kendrick

"When I was a little kid I saw a guy walk into a doughnut shop and buy everybody doughnuts. I thought that was the best example of the truly random act of kindness. It was so cool."

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4. Emma Roberts

"I like little things, like when someone hold the door for you or someone says, 'Have a nice day.' People are really rude sometimes, especially in Los Angeles!"

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5. Julie Bowen

"Over-tipping. I worked for tips for so long that I will happily take the last $20 out of my wallet and give it to the cab driver or the takeout guy."

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6. Kat Dennings

"I don't really think about doing something kind, I think there's just a way to conduct your daily life with compassion to other people. I always hold doors open, I always try to be nice. I was a Girl Scout!"

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7. Allyson Hannigan

"I just like manners. Say please and say thank you!"

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8. Melissa George

"I'm always delightful to waiters. I always want to ask their story because they're taking that job not because that's who they are; they're taking that job for money. I always want to know where they come from, what are they studying during the day to work at night."